Plastic bags for injectable solutions



Aug. 24, 1965 B. HONNET ETAL PLASTIC BAGS FOR INJECTABLE SOLUTIONS Filed Oct. 5. 1962 INVENTO BERNARD HONNE T P/ERRE MAR/E SIMONE T United States Patent 3,202,324 PLASTIC BAGS FOR INJECTABLE SOLUTIONS Bernard Honnet and Pierre Marie Simonet, Paris, France, assignors to Societe Francaise des Laboratoires Labaz Societe Anonyme, Paris, France Filed Oct. 5, 1962, Ser. No. 228,575 Claims priority, application France, Oct. 6, 1961, 875,220, Patent 1,310,582 1 Claim. (Cl. 222-181) The present invention relates to bags made of synthetic or so-ca1led plastic materials which during the last few years have tended to replace the glass bottles employed for intravenous solutions, by reason of their advantages in respect of weight, volume, economy and safety. On the other hand however, these plastic bags have a number of drawbacks as compared with glass bottles: they lack stability and cannot remain standing upright; it is diificult to add to the solution a substantial quantity of medicinal solution; and it is impossible to read the quantity injected because the bag flattens during use.

The invention has for its object to overcome these drawbacks by means of a number of improvements which may be applied conjointly or separately, if it is only required to remedy one or other of the drawbacks referred '[O.

A first improvement in accordance with the invention consists in providing the bag of plastic material with a base which is domed but which is sufliciently deformable to be invagiuable, i.e. able to be pushed back into the interior of the bag. In the first place, the bag can thus be placed on its bottom like a glass bottle, and secondly the increase in internal volume caused by the return of the bottom to its domed position enables an equal volume of medicinal solution to be added to the original solution.

A second improvement in accordance with the invention consists in providing the bag of plastic material with a domed top which is similarly invaginable, thereby providing the same utilization of the increase in internal volume when the top is returned to the domed position.

A third improvement according to the invention consists in providing the bag of plastic material with a device providing access to the interior space. This access device is preferably provided at the upper portion, for example on the top,and is constituted by a spout used on the one hand for the introduction of medicaments into the bag and employed on the other hand so as to permit the entry of air during utilization by means of a needle provided for that purpose. The bag is of course provided with a volumetric graduation, known per se, for direct reading of the quantities employed.

The invention will be described with reference to FIGS. 1 to of the accompanying drawings, given by way of example only and not in any limitative sense. In these drawings:

FIG. 1 is a view in elevation of the bag in the position of use.

FIGS. 2 and 3 are cross-sections taken along the lines IIII and 1IIIII of FIG. 1.

FIG. 4 is a view in elevation of the bag with the bottom invaginated.

FIG. 5 is a view in elevation of the bag with the top invaginated.

As shown in FIG. 1, the bag in accordance with the invention is constituted of a sheet of plastic synthetic 3,202,324 Patented Aug. 24, 1965 material and comprises a top portion 1 Wtih a tongue 2 and an eyelet 3 (see FIG. 3), which fit into suspension devices (not shown on the drawing), a main body 4 on which is shown the volume graduations 5,. a lower portion formed of rounded portions 6 and the plug device 7 into which are introduced the utilization and perfusion apparatus (not shown). A transverse section of the bag may be'circular, elliptical or oval, or may have a shape such as that shown in FIG. 2 in which a rectangular section is provided with semi-circular edge portions to define a flattened cross-section.

The bag according to the invention has the characteristic feature that it is possible, by virtue of the changes in radius of curvature of the lower portion 6, to obtain a bottom which is sufiiciently deformable to be invaginated, i.e. able to be pushed back towards the interior, as shown in FIG. 4. This arrangement enables the bag to rest on its bottom on a flat base and have the same stability as a glass bottle.

The bag is filled in this position with a predetermined quantity: 500 ml. or 1,000 ml. It can therefore be seen that in utilization it is possible to push back the concave bottom 6 (FIG. 4) towards its convex or projecting position shown in FIG. 1; the displacement of the bottom thus provides an increase in volume. It is then possible, either by means of the plug device 7 or by a special device 8 described later, to add a quantity of solution equal to the increased volume obtained by the deformation of the bottom of the container.

The invention provides that this deformable wall, which has been described for the lower portion of the bag and in the vicinity of the plug device, may equally well be provided at the upper portion 9 of the bag in the vicinity of the neck 1 on which are fixed the suspension members (not shown) as shown in FIG. 5. In the invaginated position, the tongue 2 is folded back together with the upper portion 1, on to the top 9.

The bag in accordance with the invention may of course be simultaneously provided with a deformable bottom 6 (FIG. 4) and a deformable top 9 (FIG. 5

The bag according to the invention may be provided, preferably at the upper portion, with a device 8 giving access to the interior of the container. FIG. 1 shows this device at the upper portion. The device comprises a spout which is projecting or recessed with respect to the wall of the bag. This spout will preferably be employed for the introduction of medicaments to the interior of the bag, and also for the positioning of an air-inlet needle. In this latter case, the interior of the bag during the course of perfusion of the solution will be in equilibrium with atmospheric pressure and will regain its geometrical form, even if part of the solution has passed out through the spout 7. This method of ensuring perfusion thus permits precise reading of the graduation 5 of the bag.

What we claim is:

A bag of flexible plastic material for containing a solution, said bag being constituted by a single piece of material defining a tubular body of flatted section with a base at each of opposite ends of said body, at least one of said bases having curved surfaces and suflicient flexibility for being deformable between an invaginated position within said tubular body and a protruding position, said one base in the invaginated position thereof permitting the bag to be self standing, a sealed tongue on the 3 other of said bases including suspension means, said tongue being originally open and adapted for permitting the introduction into said bag of said solution, said tongue being sealed after the solution has been introduced into said bag, and discharge means on said one base for removing the solution from said bag.

References Cited by the Examiner UNITED STATES PATENTS Re. 24,251 12/56 Kaplan et a1. 222--107 1,663,664 3/28 Loomis 2,858,051 10/58 Cunningham 2,897,826 8/59 Di Vito 3,078,017 2/63 Waskonig et a1. 3,081,002 3/63 Tauschjnski et a1.

LOUIS J. DEMBO, Primary Examiner.

RAPHAEL M. LUPO, Examiner. 

